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发明名称
摘要
申请公布号
FR2299663(B3)
申请公布日期
1979.10.05
申请号
FR19750038101
申请日期
1975.12.12
申请人
RITZERFELD GERHARD
发明人
分类号
G03B21/132;G03B21/20;(IPC1-7):G03B21/13;G02B5/08
主分类号
G03B21/132
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